EP 0470830 B1 19950419 - Metallic hollow O-ring and process for producing same.
Title (en)
Metallic hollow O-ring and process for producing same.
Title (de)
Metallischer hohler O-Ring und Verfahren zu seiner Herstellung.
Title (fr)
Anneau torique, métallique et creux et son procédé pour produire la même chose.
Publication
Application
Priority
JP 20877990 A 19900807
Abstract (en)
[origin: EP0470830A1] A metallic hollow O-ring (10) comprises a metallic shell (12) formed continuously in the circumferential direction into a ring-like form and a continuous hollow portion (14) formed in the circumferential direction inside the metallic shell, said metallic shell being welded (16) intermittently or continuously in the circumferential direction. A process for producing such a metallic hollow O-ring (10) comprises a step of bending a material to form the ring-like metallic shell (12) so that a hollow portion (14) is formed continuously in the circumferential direction inside the metallic shell and, at the same time, an opening (30) is formed continuously in the circumferential direction in a space between the edge portions (28) of said metallic shell, and a step of welding (16) the edge portions together intermittently or continuously in the circumferential direction so that said opening portion is blocked partially or wholly. Metallic hollow O-rings with such a welded structure are capable of easy low cost mass production and are excellent in sealing performance and mechanical strength. <IMAGE>
IPC 1-7
IPC 8 full level
B21D 53/18 (2006.01); F16J 15/08 (2006.01)
CPC (source: EP)
B21D 53/18 (2013.01); F16J 15/0893 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0470830 A1 19920212; EP 0470830 B1 19950419; AT E121519 T1 19950515; CA 2048586 A1 19920208; DE 69109020 D1 19950524; DE 69109020 T2 19950831
DOCDB simple family (application)
EP 91307263 A 19910807; AT 91307263 T 19910807; CA 2048586 A 19910807; DE 69109020 T 19910807